The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1991
Filed:
Jan. 17, 1989
Yoshitaka Murata, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A flash photography system of the kind performing a flash adjusting action in a mode of adjusting an aperture value, a guide number, etc. according to a distance to an object to be photographed is arranged to allow the flash adjusting action to be performed in the above-stated mode only when a combination of the object distance detected by an automatic focusing device and the focal length currently set shows a given value. If the combination fails to show the given value, the system either has the flash adjusting action performed in a manner which differs from the above-stated mode or allows the flash adjusting action to be performed in the above-stated mode by changing the focal length of a photo-taking lens.